Electric railway-motor.



11o- 753,925. PATBNTBD MAR. s, 1904.vv

' R. SIBGPRIBD.

ELECTRIC RAILWAY MOTOR. APILIUATION IILED HAY 2. 19037 N0 MODEL. 4SHEETS-SHEET 1v,

,4T aimer.

PATRNTRD- MAR. 3, 1904.

R. SIRGFRIRD. ELECTRIC RAILWAY MOTOR.,

APPLICATION FILED HAY 2. 1903.

N0 MODEL.

K //4/%/Tl /NVENTR BY Tram/Er. y

PATBNTED MAR. 8,-19041 v R.;SIBGPRIBD. ELECTRIC RAILWAY MOTOR.

APPLIOATION FILED MAY 2. 1903.

.H0 MODEL.

llvvffiron WTNESSES.'

NQ. 753,925. PATEN'TED MAR. 8

R. SIEGFRIED. ELECTRIC RAILWAY MOTOR.

APPLIUATION'FILED HAY 2. 1903. I

4 SHBETSHBBT 4.

NO MODEL.

IN1/Enron A TTU/HIE?.

THE Nonnls EE'TERS ou. PHoTo.L|T:o WASHINGTON. n, c.

Patented March 8, 1904.'

' UNITED "STATES, PATENT OFFICE.

ROBERT s IEGERI'ED, OE PITTsBURe, PENNSYLVANIA, AssIGNOR To wEsT-INGHOUsE ELECTRIC a MANUFACTURING COMPANY, A CORPORATION OFPENNSYLVANIA.

ELECTRIC lAlLwAY-MOTOR.

SPECIFICATION forming part of Letters Patent No. 753,925, dated March 8,19'04.

Application led May 2, 1903. Serial No. 155,429. (No model.)

'To MZ whom it may concern:

Be it known that I, ROBERT SIEGFRIED, aA citizen of the United States,and a resident of Pittsburg, in the countyl of Allegheny and,

State of Pennsylvania, have invented a new and useful Improvement inElectric Railway- Motors, of which the followingyisa specication. l i

:My invention relates to electric railwayl Io motors; and it has for itsobject to provide a` motor-frame of improved construction and a v simpleand eiiicient suspension means therefor which are mutually adapted toeach other and to the service in which they are to be employed.

I My invention is primarily designed for embodiment in motors used inthe propulsion of mining-locomotives, though not necessarily limited tosuchuse. v

A very desirable feature in electric loco- 20 motives for mining use isa short wheel-base and the consequent reduction in the size of thecomplete locomotive. In order to secure this advantage, it is necessaryto make the motors as compact as possible and to reduce to a minimum thedistance between the center of the armature-shaft and that of thedriving-axle. f I

It is a usual practice when climbing grades in mines to use sharp sandon the rails in order to increase to a maximum the friction between thedriving-wheels and the rails, the

result being that the wheels wear so rapidly as to necessitate frequentreplacement. In

, order to facilitate such replacement or the replacement ofaxle-bearings, it is desirable that the motors be so suspended and ofsuch construction that the driving-axles may be easily and expeditiouslyremoved by disturbing a minimum number of parts. The im- Y provementsherein described are designed to accomplish this result and to meet thepeculiarl conditions which are imposed by the shape of thelocomotive-frame; and the specific objects of such improvements are,first, to provide electric railway-motors of such construction that theyshall occupy aV minimum amount of space and shall have a minimumdistance between the centers of the armature-shafts and those of thecorresponding drivingaxles,shall be easily accessible and be readilyremovable from the locomotive frame or truck by disturbing a minimumnumber of parts; second, to provide each motor with'a exible and pivotedsuspension, which, by means ofv a llink motion between the motor and itssuspensionrod, permits at all times of a vertical straight- 4line motionof the locomotive journal-boxes;

third, to provide anaxle-cap in one piece to `cover the driving-axlebearings and all portions of the driving-axle between said bearings,said cap being easily and expeditiously removed without opening thelmotor or disturbing the other parts, and, fourth, to so support thegear-case that its lower .half may be removed simultaneously with theaxle-cap.

My invention is illustrated in the accompanying drawings, in which-Figure 1 is a side elevation of two motors as they appear when mountedin running position on the locomotive-truck, only parts 'of the latterbeing shown. Fig. 2 is a view similar to Fig. 1, but showing only aportion of one ofy the motors, the axle-cap of the other motor beingremoved and the locomotiveframe being raised to nearly the heightnecessary for removal of the axlesfrom their boxes. Fig.. 3 is anendelevation of one of the motors in running position looking at thesuspension end. Fig. 4 is an end elevation of aV motor looking at theaxle end. Fig. 5 is a transverse section through the motor and thetruck-axle, and Fig. 6 is an end elevation corresponding to Fig. 3 andshowing a modified' form of suspension means. l

The locomotive-frame l, a portion only of which is shown, is supported,by four wheels 2 and in turn serves in conjunction with the axles 3 ofsaid wheels to support two electric motors 4 and 5 by a means andin amanner to be hereinafter more fully described. Itwill be understood thatthe locomotive-frame 1 may, if desired, -be Vso constructed as toconstitute a truck-frame upon which issupported a vehicle-body of anysuitable' form and dimensions or which constitutes a partial support forsuch vehicle-body, one or more other trucks being utilized in connectiontherewith for such purpose. The two motors 4 and 5 are reverselyarranged, so that the gears (not shown) and cases 6 necessitate anoffset relation of the two with reference to the central plane o1' thelocomotive or truck. This offset or lstaggered arrangement of the motorspermits ot' a simple and convenient arrangement of supporting means forthe adjacent ends, as will be now described.

Each motor-frame is provided with a lug or nose 7, to which is pivotallyattached the bifurcated lower end of a suspension-rod 8, the upper endof which is screw-threaded and provided with a nut 9, which rests upon abar or plate 10 of such length as to receive the two rods 8 throughholes at its respective ends. A suspension-bar 11, constituting a partof the locomotive-frame 1, is bolted to the side plates, as indicated inFig. 3, and has a depressed middle portion 12, which may be ofapproximately the same length as the bar or plate 10, and between thisportion and the'plate the suspension-rods are surrounded by supportingand cushioning springs 13. I have also shown a third spring 14, locatedbetween the said parts 10 and 12 and intermediate the springs 13, whichsurround the suspensionrods 8; but obviously the number and arrangementof such springs may be varied from what is shown.

Each suspension-rod 8 is provided with a shoulder 15, and upon the twoshoulders rests a bar 16, between which and the part 12 of thesuspension-bar 11 are also located three coil-'springs 17, two of whichsurround the respective suspension-rods 8 and the other of which islocated intermediate the same. The holes 18 through the suspension-bar,which receive the suspension-rods 8, are of larger diameter than therods in order that the latter may be free to swing or move laterallywithin certain limits.

In Fig. 6- is shown a modification of the suspension-bar illustrated inFig. 3. Cushioning-springs 19 and supporting-springs 2O are placed atboth ends of the straight suspension-bar 21, surrounding the bolts 22,which secure said bar to the locomotive-frame 1. Suspension-rods 23 arebolted directly to the suspension-bar 21, substantially as shown.Obviously the details of the construction of the suspension-bar andsuspension-rods may be varied further within considerable limits withoutdeparting from the scope of my invention.

It will be observed that each motor-frame is split along a line whichpasses through the center of the armature-shaft 24, but is located abovethe center of the corresponding driving-axle 3, this arrangement beingsuch as to permit of removing the motor from theaxle or the axle fromthe motor without opening the motor-casing. Heretoi'ore motors or' thistype have been split symmetrically with respect to the field-magnetpoles--that is, on a line midway between the poles. In order to reduceto a minimum the distance between the centers of the armature-shaft andthe driving-axle, the motor herein described is split unsymmetrically,as indicated by line C D in Fig. 5. Advantage is taken of the usuallyunoccupied space between the lield-magnet coils 25 and 26, adjacent tothe axle 3, by making the axle-bearing housings to project into saidspace, substantially as shown in Fig. 5. The axle-bearing is entirelyseparated from the inside of the motor by means of a wall 27, so that itis impossible for oil to run into the motor and injure the insulation ofthe fieldmagnet coils, as is often the case in motors which are split ona line through the centeroil the armature-shaft and that of thedrivingaxle. It will be understood that the plane of division of themotor-frame may be below instead of above the axle, it' desired.

Each axle-cap 28 is formed in one piece, which extends throughout theentire length of the axle, and therefore serves to effectively excludeall dust and dirt. The bearing-housing 29, of which the cap constitutesa part, is divided at a suitable angle with reference to the verticalplane, so that when the motor is tilted to substantially the positionindicated in Fig. 2 and the axle-cap removed the axle may be readilywithdrawn from its bearings. The axle-cap 28 is fastened in position bymeans of eight tap-bolts 30 and is also provided with cups 31 forsupplying oil to the bearings. The axle-cap is also provided `with a lug32, which may be cast integral with it and have such location anddimensions as to provide a support for the gear-case 6, the lower halfof the latter being securely fastened thereto by means of acorresponding lug 33 and bolts 34. A more rigid support is thus providedfor the gear-case than would be possible if it were secured to anaxle-cap covering only one bearing. To remove the gearcase, it is onlynecessary to remove the bolts 34, securing its upper half to its lowerhalt', and the said lower haltl is then removable simultaneously withthe axle-cap 28.

The journal-boxes 35 are mounted in guides 36, with which the sides ofthe locomotiveframe are provided, so as to move vertically therein,springs 37 being interposed between the boxes and the frame.

It will be seen that the hereinbefore-described means for supporting theinner ends of the motors are such as to permit of a free straight-linemotion of the journal-boxes in their guides and that the constructionand arrangementof bearing-housings and gear-cases are such as to permitof the ready removal of the axles and gear-cases, the approximatepositions assumed by tlie several parts when such removal is effectedbeing indicated in Fig. 2.

From the drawings and the foregoing description it is evident that Ihave provided an IOO IIO

electric railway-motor of verycompact construction, having a minimumdistance between the center of the armature-shaft and that of thedriving-axle, and one having a frame that issplit in a manner to bestsecure the said advantages and also to facilitate theremoval of themotor, the locomotive or truck frame, or the wheels and axles. It willbe further observed that I have also provided a exible suspension forrailway-motors which allows a sufcient link motion between the motorandthe suspension-rods to permit of a `vertical straight-line motion ofthe journal-boxes at all times, and particularly when the driving-axleis to be removed from the locomotive-frame, and an axle-cap andgear-case so constructed and united that the driving-axle may be removedby the disturbance of a minimum number of parts. a

It is obvious that the details of construction may be varied withinlimits without departing from the scope of my invention, and Iwish itexpressly understood that my invention should not be limited to use onmining-locomotives only, as it is practicable to use the same type ofsuspension and construction on other railway-vehicles.

I claim as my inventionl. The combination with a four-wheel truckframe,of two electric motors having their outer ends journaled upon theaxles,a single cross suspension-bar, substantially vertical suspension-rodsthelower ends of which are respectively attached to the inner ends of themotors and the upper ends of which are attached to the suspension-barand springs interposed between the suspension-rods and the bar.

2. The combination with a four-wheel truckframe, of two electric motorshaving their outer ends journaled upon the axles of the truck-wheels,substantially vertical suspension-rods having their lower endsrespectively pivotally connected to the inner ends of the motor-frames,a cross suspension-bar and supporting and cushioning springs interposedbetween said bar and the upper ends of the supporting-rods. l

3. The combination with a four-wheel truckframe, of two electric motorshaving theirv youter ends jurnaled upon the axles of the truck-wheelsand having lugs at their inner ends, substantially verticalsuspension-rods having their lower ends pivotally connected to therespective lugs` a suspension-bar extending from side to side ofthetruck-frame above the motors and having holes of greater diameter thanthe suspension-rods through which said rods project, bars or platesfastened to said rods above and below the suspension-bar and springsinterposed between said bar and said plates. i f

4. Ihe combination with a four-wheel truckframe, of two electric motorshaving their inner ends flexibly suspended from said frame and havingtheir outer ends journaled upon the axles of the truck-wheels,bearing-housings comprising removable caps and two-part gear-cases onepart of each of which is'fastened to and removable with thecorresponding cap.

5. In a truck having an electric motor journaled at one end upon atruck-axle, a bearingcap for such axle which extends the entire lengthof the axle.

6. In an electric locomotive, an electric motor having a two-partbearing-housingthat completely incloses the axle, the plane of divisionbetween the two parts being angularly disposed with `reference to .both`the vertical and the horizontal.

7 A truck-frame having vvertical guides vin combination with axleshaving. boxes mounted in said guides, springs interposed between theframe and the boxes, electric motors having their outer ends journaledon saidV axles and iexible, link-motion suspension devices for the innerends of the motors. ,v

-V 8. The combination with a truck, of an *electric motor having one endjournaled upon a truck-.axle and its other end flexibly suspended fromthe truck-frame, and a removableaxlecap which extends the entire lengthof theaxle.

ltruck above the inner ends of both motors and means for exiblysuspending said inner ends from the cross-bar.

11. An electric motor having. atwo-'part `frame the plane of division ofwhich is through the armature-axis but is unsymmetrically located withreference to the pole-pieces of the a vmotor field-magnetfi 12. Anelectric rail way-'motor having a twopart frame journaled at one endupon a truckaxle the plane of division of whichisthrough the armatureaxis, andrunsymmetrically located with reference to both the Held-magnetpole-pieces and the axle.

13. An electric railway-motor having a twopart frame journaled at oneend upon a truckaxle below the plane of division, said plane beingcentral but unsymmetrical with refer,- ence to the field-magnetpole-pieces.

14:. An electric railway-motor having atwopart frame provided with annaxle bearing housing at one end that projects into the space betweenadjacent pole-pieces, the plane of division being through thearmature-axis and at one side of the'bearing-housing.

IOO

IIO

15. An electric railway-motor having a twopart frame supported at oneend upon atruckaxle, and having a two-part bearing-housing one of theparts of which is integral with the frame and projects into the spacebetween adjacent pole-pieces at one side or' the divisionplane of theframe.

16. An electric railway-motor having a twopart frame supported at oneend upon a truckaxle and having a two-part bearing-housing thatcompletely'incloses the axle. l

17. An electric railway-motor having a twopart frame supported at oneend upon a truckaxle and having a two-part bearing-housing thatcompletely incloses the axle, one of the parts of which is integral withthe motorframe and projects into the space between adjacent pole-pieces.

18. An electric railway-motor having a twopart frame supported at oneend upon a truckaxle and having a two-part bearing-housing thatcompletely incloses the axle, and one part of which is integral with theframe and projects into the space between adjacent polepieces at oneside of the division-plane of the frame.

19. In an electric railway-motor, an axlebearing housing having aremovable cap that extends from end to end of the axle and is providedwith oil-cups and with means for attaching a gear-casing thereto.

20. rlhe combination with the Wheels and axles of a truck, of a framesupported upon the axle-boxes, electric motors supported at their outerends upon said axles, a cross-bar and two substantially verticalsuspension-rods respectively hinged at their lower ends to the innerends of the motors and loosely suspended from said cross-bar.

21. The combination with the wheels and axles of a truck and a framesupported thereby, of electric motors the outer ends of which aresupported upon said axles, a cross-bar supported by said frame betweenand above the motors and two suspension-rods depending from saidcross-bar and having a loose, cushioned connection therewith and a hingeconnection between the lower end of each rod and the inner end of thecorresponding motor.

In testimony whereof I have hereunto subscribed lny naine this th day ofApril, 1903.

ROBERT SIEGFRIED.

I'Vitnesses:

GEO. V. MILLIGAN, OTTO S. SCHAIRER.

